(obsolete) A cheap ale, sold at fourpence per quart / (obsolete) Ellipsis of four-ale bar.

Less common spelling of fourfold

(rail transport) Synonym of four-tracked.

(slang, US) information

24 hours per day, seven days per week. Designates a round-the-clock service, typically including holidays, as might be offered by a supermarket, ATM, gas station, concierge service or manned data center.

(baseball) A backspin pitch thrown with a ball gripped in the direction to cause four of the seams of the ball to cross the flight path and released with roughly equal pressure by the index and middle fingers

A reference to any of several of the strongest English swear words that are also four letters long, especially those composing the so-called seven dirty words.

An engine that works on the four-stroke principle.

plural of four-letter word

(biblical) Four beings in Revelation 6:1–8 that bring about the Apocalypse, each riding a different-colored horse representing a different aspect of the Apocalypse.